CA2631864C - Electrical energy storage system - Google Patents

Abstract

The invention relates to an electrical energy storage system (100) comprising at least one coiled electrical energy storage element placed inside a casing (200), said casing (200) containing the coiled electrical energy storage element in a main body (210) of the casing (200) and including at least one cover (230, 240), characterized in that said cover (230, 240), placed at one end of the main body of the casing (200) and electrically connected by electrical connection means (280) to the coiled electrical energy storage element, is fastened to the main body (210) of the casing (200) by a bonding means (600). The invention is particularly applicable in the production of electrical energy storage assemblies such as supercapacitors, batteries or generators.

Description

Electric energy storage system Field of the invention The invention relates to energy storage assemblies electric. It applies, in particular, but not exclusively, to supercapacitors, capacitors, and generators or batteries. More specifically, the present invention relates to sealing and connection electric of a set of electrical energy storage.

Presentation of the prior art A significant number of energy storage assemblies electric, so-called high power, have recently been proposed, like, for example, supercapacitors.
However, the known devices do not give totally satisfaction with their tightness and their power connection.
Conventionally, a supercapacitor comprises a coiled element consisting of a stack of sheets (anode, collector, anode, separator, cathode, collector, cathode, separator) wound on itself and from which at each end a leaf called current collector. This wound element is placed in an envelope comprising a closed main body, at least one of its two ends, by a cover.
According to the state of the art, to achieve such a set of electrical energy storage, the cover is attached to the main body of the envelope by a mechanical assembly such as by crimping, screwing or rolling, (flap of the main body edge on the lid crushing a seal located between the two).
On the other hand, there is also the regular use of coins electrical connection for making the electrical connection, within the main body of the envelope, between each cover provided with a stud of electrical connection and the wound element.
Some designs use as electrical connection the current collector protruding from the wound element and cut for form one or more stacks of collector tabs

2 current, these tabs being then connected to the electrical connection pad of the lid.
However, these achievements are complex and lead to bulky electrical energy storage assemblies.
On the other hand, the current is not uniformly distributed in the wound element because all the turns are not connected to the electrical connection pad. This feature favors ionic and electronic concentrations in certain detriment of others, leading to:
- an increase in series resistance that has consequences harmful to the performance of the storage element energy (lower energy and power available), - a warm-up favored by a bad evacuation of the internal heat by the current collectors and - a localization or an acceleration of the aging of the energy storage element.
Other achievements then propose welding, by a transparency laser technique, a connection piece intermediate electrical cable placed between the wound element and each of lids.
However, these designs are complex because of the multiplication of the acts to realize. Moreover the presence of this piece intermediate weighs the design of the energy storage assembly electrical in terms of mass.
We can also mention a storage set design of electrical energy where the wound element is directly plated and welded against coverings to optimize the volume of the whole.
In this case however, the mechanical closures of the lids prevent the weld areas on the lids from entering in contact with all the turns of the wound element and then limit also the quantity of welded turns.
On the other hand, all these realizations of supercapacitors have as a common point to present leaks.

3 Indeed, the aging of these sets of type supercapacitors leads to a gas generation in the envelope of the electrical energy storage element that causes a rise in pressure inside the envelope.
The conventional closures by rolling or screwing lids on the main body of the envelope are not suitable for resist this rise in pressure and generate losses sealing of the electrical energy storage assembly, from where sometimes solvent leakage, even in the worst case, its sudden opening.
Moreover, at present, these mechanical assemblies of electrical energy storage assemblies require, during the putting modules into modules, adding an electrical connection piece between each pair of neighboring sets in order to connect them electrically.
In some designs, these barrette-type parts flexible, braid or stack of strips, are screwed on each of respective electrical connection pads of a pair of sets of electrical energy storage.
These module designs often require treatment expensive parts, such as tinning or nickel plating, to ensure optimal electrical contact by screwing Other embodiments provide welding of these parts. But ies temperature rises created by the weld often limit its realization on unfinished elements and lead most of the time to assemble the modules before the electrolyte filling phase, this which greatly complicates the manufacturing process.
The realization of these assemblies modules by adding pieces of Connectivity is long and complex.
The purpose of the invention is in particular to overcome the disadvantages of the prior art.
Another object of the present invention is to propose a system electrical energy storage having an easy configuration to achieve while providing a simple and secure electrical connection.

4 Another object of the present invention is to propose a system electrical energy storage having a sealing system reliable over time, resistant to very high internal pressures and whose tightness, adjustable, can reach values below 10-9 mbar.ls "1.
It is also desirable to offer storage systems of electrical energy that offer savings in terms of costs, weight, space, time in their realization.
Another object of the present invention is to propose a system electrical energy storage that facilitates its association with other similar systems to form a storage module of electrical energy.

Summary of the invention These objects are achieved, according to the invention, thanks to a system of electrical energy storage comprising at least one wound element storage of electrical energy placed inside an envelope, said envelope enclosing the coiled energy storage element in a main body of the envelope and comprising at least one at least one cover, characterized in that said cover, arranged at a end of the main body of the envelope and electrically connected by means of electrical connection to the storage coil element electrical energy, is attached to the main body of the envelope by a medium of collage.
According to another advantageous characteristic of the invention, the means adhesive is arranged to overcome a positioning seal interposed between the main body of the envelope and the cover.
According to another advantageous characteristic of the invention, the seal of positioning and the gluing means are arranged in a groove annular delimited by the main body of the envelope and a collar present on said lid.
According to another advantageous characteristic of the invention, at least two electric energy storage systems according to the invention can form an electrical energy storage module using a single electrically conductive piece comprising two or several lids, coming from materials or solidarity by assembly, which respectively contain reeled storage elements

5 of electrical energy arranged in main body of envelope juxtaposed.

Brief description of the figures The invention will be better understood and other advantages and characteristics will appear on reading the description which follows, given by way of non-limiting examples and with the accompanying drawings among which:
FIG. 1 illustrates a longitudinal sectional view of a system storage of electrical energy according to the invention;
FIG. 1a shows a similar sectional view of a variant whose lids have a double collar;
Figure lb shows a longitudinal sectional view of a another variant whose main body envelope forms duplicates flanges to trap the lids;
FIG. 2 shows a view in longitudinal section of another variant of Figure 1;
FIG. 3 illustrates a perspective view from above of a cover of an electrical energy storage system according to the invention;
FIG. 4 illustrates a perspective view of the underside of a cover of an electrical energy storage system according to the invention;
FIG. 5a illustrates a view from above of a cover of a electrical energy storage system according to the invention provided with electrical connection means, while Figure 5b illustrates the same cover according to a longitudinal section passing through lvs half plans of sectioned cut VV in Figure 5a;
FIG. 6a illustrates a view from above of a variant of

6 cover of an electrical energy storage system according to the invention provided with electrical connection means, while FIG. 6b illustrates the same lid in a longitudinal section through the half sectional planes referenced VI-VI in Figure 6a;
FIG. 7a illustrates a view from above of another variant of cover of an electrical energy storage system according to the invention provided with electrical connection means, while FIG. 7b illustrates the same lid in a longitudinal section through the half sectional planes referenced VII-VII in Figure 7a;
FIG. 8 illustrates a view from above of a lid according to another variant of the invention;
FIG. 9 illustrates a longitudinal sectional view of a bar binding according to the invention;
FIGS. 10a and 10b illustrate, in longitudinal section, a alternative embodiment of an electrical energy storage system according to the present invention in which the main body envelope is provided with an expansion bellows respectively in rest position in FIG. 10a and after extension of the bellows on the Figure 10b;
FIGS. 11a, 11b, 11c and 11d illustrate sectional views of four variants of positioning joints;
- Figure 12 illustrates a synoptic diagram of the different steps of a method for producing an energy storage system electric device according to the invention;
FIG. 13 illustrates a longitudinal sectional view of a module storage of electrical energy according to the invention carried out using two associated systems;
FIG. 14 illustrates a view from above of a bi-lids part an electrical energy storage module according to the invention;
FIGS. 15a and 15b illustrate, respectively, a view of above and a side view of an electrical energy storage module according to the invention realized using a larger number of systems associates; and

7 FIG. 16 shows a longitudinal sectional view of a variant of energy storage system according to the invention comprising a channel tubular core allowing the passage of a coolant for the purposes of thermal regulation of the system.
Detailed description of the invention - Figure 1 illustrates an electrical energy storage system 100 according to the invention.
An electrical energy storage system 100 includes a envelope 200 formed of a main body 210 receiving an element coiled electrical energy storage and two lids 230 and 240 closing the main body 210 of the envelope 200 to its two ends. It also includes cover sheets 230 and 240, electrical connection means 280 (see FIG. 3) intended to provide a electrical connection between the covers 230, 240 and said wound element.
The main body 210 of the envelope 200 is under the form of a cylinder 211, open at both ends 212 and 213 and centered on an XX axis.
Advantageously, this cylinder 211 is rigid and lightweight.
Preferably, it is aluminum and its thickness is included between 0.4 and 1 mm.
According to an alternative embodiment of the storage system of electric energy the cylinder 211 is made of plastic.
On the other hand, this cylinder 211 has an internal diameter and a length adapted to the wound element of electrical energy storage that it contains.
However, an alternative embodiment provides a length of cylinder 211 smaller than that of the storage coil element electrical energy, so as to put the latter under pressure when closing the main body 210 of the envelope 200 by the two covers 230 and 240.
The wound element placed in the main body 210 of the envelope WO 2007/06574

8 PCT / EP2006 / 067210 200 can be the subject of many variants. It will not be therefore not described in detail later. It is not illustrated either in detail in the accompanying figures. However it is schematized on Figure 1 under the reference 700.
In one embodiment of the invention, the wound element of electrical energy storage is a cylindrical coil centered on XX axis.
It is formed, in a manner known per se, from a stack of sheets (anode, collector, anode, separator, cathode, collector, cathode, separator) wound around a central axis which coincides after assembly with the axis XX, with or without the presence of a support central solid, and from which at each end passes one called current collector, sheets composing the stack.
Indeed, the coiled element of electrical energy storage is delimited at its two opposite ends, respectively, by two current-collecting slices, spiral-shaped.
These are intended to be connected to the connecting means 280 of the two covers 230 and 240 which cover them as will be described later in connection with FIGS. 3 to 9 especially.
Moreover, the two covers 230 and 240 electrically drivers, each in the form of a electrical connection disc 231 and 241, arranged perpendicularly to the XX axis.
Each of these disks 231 and 241 comprises, respectively, the along its outer periphery, a flange 232, 242 formed of a cylindrical skirt centered on the axis XX.
Preferably, each of the covers 230, 240 is rigid and in aluminium.
The thickness of each of the electrical connection discs 231 and 241 is designed to ensure, in a manner known per se, a section sufficient current flow according to the radius of the disks 231 and 241.

9 On the other hand, in the variant embodiment of the invention of the FIG. 1, the external diameter of each of the connection disks 231 and 241 is greater than the outer diameter of the cylinder 211.
Thus, the flanges 232 and 242 are placed on the outside of the outer wall of the cylinder 211. Thus the latter and the wall internal of each of the flanges 232 and 242 of the covers 230 and 240 arranged on the opposite ends 212 and 213 of the cylinder 211, define, respectively, two annular grooves 236 and 246, external to the main body of the envelope 200.
In a preferred embodiment of the invention, in order to position and secure each of the covers 230 and 240 to both ends 212 and 213 of the cylinder 211, a system is used comprising a positioning joint 500 and a means of collage 600.
In the variant embodiment illustrated in FIG. 1, two joints positioning cylinders 510 and 520, annular, are mounted tight on ie cylinder 211 at its two ends 212 and 213 and, more specifically, annular grooves 236 and 246.
These seals 510 and 520 have the primary role of providing insulation between the main body 210 of the housing 200 housing the coiled electrical energy storage element and each of the two covers 230 and 240.
Thus, preferably, they are in an electrically non-material conductive, for example of polytetrafluoroethylene (PTFE) loaded glass or not, or in plastic, polyphenylene type RytonO.
The second role of the joints 510 and 520 is that of gluing means 600, before and during its polymerization, allowing the latter not to sink inside the cylinder? 11 to avoid deteriorate the coiled electrical energy storage element.
Thus, as shown in FIG. 11a, the positioning joints 510 and 520 may have a rectangular cross section.
However, as illustrated in FIGS. 11b, 11c and 11d the positioning joints 510 and 520 can be the subject of numerous variants, with for example transverse sections, respectively, circular (Figure 11b), L-shaped with concavity of the L tour generally radially inward, either towards the body 5 main 211 of the envelope 200 (Figure l1c) or vice versa (Figure lld).
The positioning joints 510 and 520 are thus overcome, respectively in annular grooves 236 and 246 by means of 610 and 620 bonding to secure the main body 211 of the envelope 200

10 with each of the covers 230 and 240. By overmcntés means in the context of this description, the fact that the means of 610 and 620 bonding are placed on the outside of the joints of positioning 510 and 520 with reference to the path leading internal volume of the cylinder 211 outside of it, through the passage formed between the cylinder 211 and the covers 230 and 240.
The height, considered parallel to the axis XX, means of 610 and 620 coli deposited along the circumference of the gorge rings 236 and 246, in contact with each of the covers 230 and 240 and the cylinder 211, is adapted to not exceed the height of each of the flanges 232 and 242 of the covers 230 and 240.
On the other hand, the adjustable height of the bonding means 610 and 620 offers a variable seal to the energy storage system 100. In fact, a high glue height increases the maintaining the system 100 at the internal overpressure of the main body 211 of the envelope 200 and prevents against the opening of the envelope 200 under the effect of this pressure.
Typically, the seal obtained by means of a collage according to the present invention between the cylinder 211 and the lids 230 and 240 of a supercapacitor, can reach very high values low, less than 10-9 mbar.ls-1. These values are very clearly lower than those commonly encountered on the products of the walk. This excellent level of sealing obtained by gluing avoids allow oxygen or water to enter the interior of the

11 supercapacitor, which would result in an acceleration of aging and therefore a decrease in the life of the product.
Advantageously, these bonding means 610 and 620 are a gas-tight, liquid-tight and electrically insulating thermosetting epoxy type.
Preferably, the latter is suitable for gluing aluminum / aluminum like, for example, DELO Monopox glue 1196 from the manufacturer DELO.
In an alternative embodiment of the invention where the cylinder 211 is made of plastic, the glue will be specific to plastic / aluminum bonding.
On the other hand, each positioning joint 510 and 520 must be resistant to the polymerization temperature of the glue used, as well that any solvent that will be used in the reeled storage element of electrical energy.
The positioning joints 510 and 520 have, also, advantageously, a sufficiently slippery external surface for allow the two covers 230 and 240 a slight latitude to displacement relative to the cylinder 211, in order to allow a easy installation of these on the cylinder 211.
This traveling latitude is used to leave a game allowing a pressurization during the electrical connection of the coiled electrical energy storage element at the covers 230 and 240 as will be described later in connection with Figures 3 to 8.
FIG. 2 illustrates an alternative embodiment of FIG. 1.
It proposes two lids 230 and 240 presenting, each, electrical connection discs 231 and 241 with an outer diameter less than that of cylinder 211.
In this case the flanges 232 and 242 are placed inside the cylinder 211.
Each of the annular grooves 236 and 246 delimited by the faces outer flanges 232 and 242 and the inner wall of the cylinder 211, then becomes internal to the cylinder 211.
In this case, each positioning joint 510 and 520 is

12 mounted, respectivernent, tight on the covers 230 and 240, plus precisely on the flanges 232 and 242, inside the cylinder 211, with a slippery external surface to allow the cylinclre 211 a slight latitude of movement relative to each of the covers 230 and 240.
In a similar manner to FIG. 1, each positioning joint 510 and 520 is surmounted, respectively, by a glue height 610 and 620 in the annular grooves 236 and 246 to secure the body main 211 of the envelope 200 with each of the covers 230 and 240.
Another variant embodiment of a storage system Electrical Power 100 proposes to replace each of the positioning 510 and 520 above by a certain thickness of a layer of elastomer or plastic type on the eyterne wall of the cylinder 211 or flanges 232 and 242 of the covers 230 and 240.
Such a layer holding a positioning joint extends the along the main body 211 of the envelope 20, according to a height adapted to that of the collars 232 and 242.
In the variant of Figure la, each cover 230, 240 has a double flange 232, 233 and 242, 243, which form a 236.446 groove in which one comes to have an end of the cylinder 211 with, at the bottom of the groove, a positioning joint 510, 520 and between the seal and the outside of the groove, a bonding means 600 according to the invention.
In another variant, illustrated in FIG.
211 which has at each of its ends, an external collar 213, 215. The latter forms with the end of the cylinder 211 a groove 236, 246 in which one comes arrange the flange 232, 242 of a cover 230, 20 with, in the bottom of groove a positioning joint 510, 520 and between the seal and the outside of the groove, a bonding means 600 according to the invention.
Several configurations of the covers 230 and 240 can close the envelope 200 containing the reeled storage element

13 electrical energy, will now be described in relation to the Figures 3 to S.
In general, each cover 230 or 240 has a electrical connection disc 231 provided with rigidity ranges 290 and welding ranges 280.
The stiffness ranges 290 have a dual function: on the one hand a mechanical role of rigidity and secondly a role of conductor electric for the passage of current. The 280 welding ranges are used as electrical connection means for making the connection between the coiled electrical energy storage element and the cover 230 or 240.
Moreover, as illustrated in FIG. 3, each cover 230, even 240, comprises on its outer face 233, opposite inside the main body 211 of the casing 200, an electrical connection pad 239.
The latter is cylindrical in shape and center of the electrical connection disc 231.
Other variants of electrical connection pads 239 are possible. They are not limited to the example illustrated in FIG.
Nonlimiting examples include bonding pads electric male or female screw, rings or studs frustoconical notches.
The rigidity areas 290 and the welding areas 280 are distributed angularly uniformly around the bonding pad electric 239.
On the other hand, the thickness of the different welding ranges is calibrated for laser welding by transparency as it will particularly described in connection with Figure 4. It is of the order of 0.4 at 1 mm and, preferably, from 0.7 to 0.8 mm.
In a variant, the operation of electrical connection between the lids 230, 240 and the wound element is made by diffusion brazing, especially by cold soldering-diffusion with gallium supply. In the case of such a connection by brazing or soldering-diffusion, the thickness of welded zones will preferably be between 0.4mm and 3mm.

14 As an alternative to laser welding by transparency, we can also make the connection by welding using any other appropriate classical technique.
Moreover, as illustrated in FIGS. 5b, 6b and 7b, the collar 232 (or 242) of the cover 230 (or 240) can be extended to the level each welding range 280 to open on the outer face 233 of the disk 231 and form a rim 238 making it possible to create a bowl, for example a receptacle receiving glue or other resin.
The connection pads are thus sealed against fluids after their connection, by adding a layer of glue or resin to any surface.
According to the first embodiment variant illustrated in FIG.
cbuvercle 230 has an electrical connection disc 231 initially plan, partially stamped according to at least one generator that corresponds globally with a radius drawn from the XX axis for forming at least one radial rib constituting a welding range 280 in the form of at least one boss 281 convex towards the interior of the main body 211 of the envelope 200. According to the firu.ire 3 it is thus provided four bosses 281 equidistributed around the axis XX. In that case the rigidity ranges 290 are delimited by a contour in sector of circle between two solder pads 280.
As can be seen from Figure 4, on the face internal 234 of the electrical connection disc 231, the generator of each boss 281 serves as a bearing surface for the wound element of electrical energy storage.
Specifically, the current slice of the element coiled electrical energy storage, concave inward of element, engages in a complementary way with the different bosses 281 of the lid 230 to which it is then connected electrically by welding along the generators of the latter.
As illustrated in FIG. 5a, the section bosses 281 transverse parabolic or trapezoidal, are preferably distributed angularly uniformly around the axis XX of the bonding pad electric 239.
They extend, in length, radially with respect to the axis XX and open on the outside of the disc 231.
Other variants of embodiments of the covers 230 and 240 5 illustrated in FIGS. 6 and 7, provide a cover comprising a electrical connection disc 231 having an internal face 234 plate and an outer face 233 having rigidity ranges 290 and soldering pads 280.
Figures 6 illustrate a variant in which ranges of 10 rigidity 290 are in the form of radial ribs 292 by relative to the axis XX and opening on the outside of the disc 231.
They form, in a non-limiting example of the invention, on the outer face 233 of the disc, a cross with four branches.
Rigidity ranges 290 alternate with welding ranges

15 280 in the shape of a sector of circle, of smaller thickness, which extend in width over a minimum area of 1 to 3 mm.
Figures 7 illustrate another variant in which ranges welding 280 are in the form of radial recesses 283 with respect to the axis XX (four recesses 283 equidistributed around the axis XX according to FIG. 7, but this example is not limiting) while that the rest of the disc 231 with its main thickness is presented as a series of rigidity ranges 293 each having the geometry of a cylinder sector.
These recesses 283, of substantially rectangular cross-section, uniformly distributed on the disk 231 extend radially and open on the outside of the disc 231.
The embodiments of cover 230 or 240 having a disk 231 with a flat internal face 234 can be accompanied one or more connecting bars 295, illustrated in FIG. 9, for make the electrical connection between the cover 230 or 240, inside of the main body 211 of the casing 200, and the collecting slice of current of the coiled electrical energy storage element.
This electrical connection bar 295 is for example

16 in the form of a rectangular piece having an outer face 296 flat and an inner face 297 comprising a boss 298 extending over its length.
The boss 298 of cross section for example parabolic or trapezoidal, will engage convex side with the slice of the element coiled electrical energy storage tank embossed so complementary and will be attached with it by welding.
In a variant, the electrical connection bar 295 is in the form of a the shape of a star grouping several pieces with bosses 298 arranged radially around the center of the star.
However, in the case where the cover 230 or i40 has an internal face 234 flat is used without connecting bar 295, the coiled element of storage of electrical energy should preferentially present, at its two ends, planified collector slices of current parallel to the inner face 234 of the electrical connection disc 231 to generate a large continuous support surface during the connection between the cover 230 or 240 and the wound element.
According to another embodiment of the covers 230 and 240 illustrated in FIG. 8, for welding all the turns of the wound element of electrical energy storage, although these turns are not on the same radius, it is expected several series of bosses 284 section substantially rectangular right, uniformly distributed angularly on the cover 230, and covering varying radial extensions on the cover surface 230.
More precisely, according to FIG. 8, the bosses 284 are divided in two series 285 and 286. More precisely still according to FIG.
is thus provided a first series of bosses 285 radially internal (for example four bosses 285) evenly distributed angularly around the XX axis and a second series of bosses 286 radially external (for example also four bosses 286) that alternate with the bosses 285 and are also angularly distributed.
These bosses 284 are preferably as described in relation to

17 with FIGS. 3 to 5.
In an alternative embodiment not shown in the figures but that description alone will allow one to understand, one can between the collecting slices and the inner part of the cover at least one layer of thin conductive metal foil, covering at least the surface of the connection collector slices. This thin sheet is added to compensate for possible lack of connection material during welding of the cover on the collecting slices.
In another variant of the same type, the metal sheet thin can be made in the form of a star whose branches cover the surface of the lid-slice connection pads collector.
Finally, if experience shows that this is desirable, we can add several layers of foil to thin meta bring a significant amount of connection material without require a large energy supply to weld them.
Another way, forming part of the invention, of to report connection material may be to perform a shoopage on the collecting slices of the coiled energy storage element in order to improve the contact between said slices and the cover or intermediate connection piece.
In all the cases described above, the connection ranges of the The slices can be made by radial coating of collector slices from the center to the outside of the wound element energy storage, in order to increase the contact surface between said slices and the cover or the intermediate connection piece.
Moreover, as illustrated in FIGS. 10a and 10b, according to a variant embodiment of a system 100 according to the invention, the body main 211 of the casing 200 is provided with at least one bellows 225 anti-opening, in order to avoid a rise in internal pressure during aging of the electrical energy storage system 100 and, particularly the generation of gas.

18 Each bellows 225 is formed for example of a rib 226 annular covering the entire circumference of the cylinder 211.
The bellows 225 is calibrated, shaped and dimensioned to allow the cylinder 211 to elongate, by its relaxation, under the effect of the rise of internal pressure while maintaining its tightness.
The lengthening of the cylinder 211, as illustrated in FIG. 10b, causes the electrical disconnection between the coiled energy storage element electrical and the associated lid 230 because the wound element of electrical energy storage is not scalable.
Breakage of the electrical connection causes the phenomenon to stop of aging at the origin of the rise in pressure.
The electrical energy storage system 100 is, thus, secured by its open circuit.
As a variant, such a bellows 225 of anti-opening security in case internal overpressure can be arranged on a lid 230 or 240 between the bonding area of the lid and the interior thereof.
Finally, with regard to Figure 16, a refinement of the invention may include the addition of a central tubular channel 150 disposed within the coil of the storage coil element of energy, said channel 150 opening through and through least one of the covers 230, 240, to allow the circulation of a heat transfer fluid for thermal regulation of the system.
This central channel 150 may be formed of a tube 152 in hollow aluminum, integral with one of the two covers 230 or 240 and glued on the other lid by a bonding means cooperating with a central flange 151 belonging to said other cover. Alternatively, the tube 152 may be independent of each lid but glued to a collar carried by each lid.
A method of producing an energy storage system electrical 100 sefon i'invention is now described in connection with the figure 12.
In a first step 810, the current collector slices of the coiled electrical energy storage element are prepared

19 to achieve the electrical connection between the element and the type of cover 230 and 240 chosen to close the main body 211 of the envelope 200.
More specifically, if the covers 230 and 240 comprise a 231 electrical connection disc with bosses 281 such as described in connection with FIGS. 3 to 5, the collecting slices of current of the element are embossed in a complementary manner to these bosses 281 while if the covers 230 and 240 comprise a 231 electrical connection disc with a flat internal face 234, fes current-collecting slices are paired parallel to this inner face 234.
On the other hand, if 295 links are used, they are welded to the current collector slices embossed with the coiled electrical energy storage element in step 820, the collector slices being folded, or not, by radial coating from the center towards the outside of the wound element.
Then, at step 830, the coil element of energy storage electrical system is inserted into the cylinder 211, which is positioning 510 and 520 at its two opposite ends 212 and 213.
It is then centered and locked inside the cylinder 211 by a central narrowing operation of the latter (step 840).
The two covers 230 and 240 are then arranged, respectively at opposite ends 212 and 213 of the cylinder 211 at step 850.
Then, in the next step 860, the electrical connection between the covers 230 and 240 and the coiled energy storage element electric laser welding by current collector transparency of the element on the welding pads 280 of each cover 230 and 240 with which they are brought into contact by pressure.
In step 870, a glue height 600 is deposited in one or the other annular grooves 236 and 246 and overcomes the seal of corresponding 510 or 520 positioning.
The system 100 is then raised to a certain temperature for to polymerize the adhesive 600 according to techniques that are well known per se, may be mentioned, as non-limiting examples, a polymerization either at ambient temperature, ie at elevated temperature, overall through an oven or, locally via ring Inductive heating or Infra red, either by UV, or any other means 5 equivalent.
Step 870 is renewed for the second cover 230 or 240 in the same way.
We thus obtain a system of energy storage 100 sefon the invention.
In an alternative embodiment of this method, a meadow is made bonding, in step 825, one of the covers 230 or 240 to a 212 or 213 end of the main body 211 of the pre 200 envelope equipped with positioning joints 510 and 520 before insertion of the wound energy storage element in the cylinder 211 at the step 15,830.
The following steps remain identical to those described previously except that the last sticking step 870 does not will concern more than the bonding of the second cover 270 or 240 with the cylinder 211.

In a third variant embodiment of this method, the step 870 bonding of the various covers 230 and 240 with the cylinder 211 is carried out before the welding step 860 of the covers 230 and 240 on the coiled element for storing electrical energy.
In this case, the collage, at one and then at the other end of the body main 211 of the envelope 200, is carried out while maintaining the two covers 230 and 240 under pressure on the collecting slices of current of the coiled electrical energy storage element with a view to keep an optimal contact before welding the element with each of the covers 230 and 240.
Moreover, an alternative embodiment of a storage system electrical energy 100 seion i'invention provides the use of a cylinder 211 provided with a solid bottom having the shape of a lid.
In this case, step 840 of central narrowing of the body

21 the main envelope is deleted. The reeled storage element electrical energy mechanically linked to the cylinder 211 then remains floating before the welding step 860.
On the other hand, a sticking operation of a lid is deleted in step 870.
In a fourth embodiment variant of the method, the laser welding by transparency to make the connection between the coiled energy storage element and the covers 230 and 240 is replaced by a brazing / diffusion process, by example soldering / diffusion Gallium.
In this process, a gallium deposit is made on the inner face each lid 230 and 240 and brought into contact with the slices current collectors of the element. The whole is then soldered for make the electrical connection of the different elements.
It should be noted that the realization of this process involves the use of positioning joints 510 and 520 temperature-resistant brazing / diffusion.
This energy storage element assembly method can be adapted to be used in the realization of a storage module electrical energy 110 such as this will now be described in relationship with Figures 13 to 15.
Figure 13 illustrates the association of two storage systems of electrical energy 100 forming an energy storage module Electric 110 Each of the electrical energy storage systems 100 is such as previously described in connection with FIGS. 1 and 2.
However, at the same end of each of their cylinders 211a and 211b respectively, the two systems 100 contain their element coiled electrical energy storage 700 through a piece of common electrical connection 900 comprising two lids conductors 230a and 230b, each intended for se; ixer on one of electrical energy storage systems 100.
This piece 900 is thus used to make the electrical connection

22 between the two electrical energy storage systems 100 Juxtaposed.
As illustrated in Figure 14, the part 900 has the shape of a pallet 910 which comprises, respectively, at each of its ends 911 and 912 an electrical connection disc 231a and 231b provided on its circumference of a flange 232a and 232b, and a bar 920 central connecting the two disks 231a and 231b.
Returning to FIG. 13, the outer face 914 of the pallet 910 is flat while the 915 interior face of the 910 pallet that engages with a main body 211 of each envelope 200a and 200b presents the two flanges 232a and 232b.
The main body 211 of the envelope 200 of each of the two electrical energy storage systems 100 such a module is set to this piece 900 and, more precisely, each to one of the covers 230a and 230b of the 910 pallet by a positioning joint assembly 500 / gluing medium 600.
In an exemplary embodiment where a storage module of electrical energy 110 comprising two systems 100 is intended for be functional alone, the two lids 240a and 240b independent from each other and opposed to the 910 double-lidded pallet, linked by electrically welding, inside each of the main bodies 200, to the two wound elements of energy storage each have on their external face a bonding pad electric 239.
To form a module 110 comprising more than two elements coils for storing electrical energy, as illustrated by the figures 15a and 15b, the electrical sequence of the systems 100 is effected by through 910 pallets.
According to FIG. 15b, these pallets 910 are arranged, in alternation, as an upper bi-lid and then a lower bi-blanket main body pairs of 200 pairs of systems of electrical energy storage 100 juxtaposed.
Thus, to make a module of n storage coil elements

23 of electrical energy in series combination, where n is greater than or equal to 3, the systems 100 will be interconnected in pairs by means of n-1 bi-covers 900. The two lids 900 are successively located at opposite ends of the energy storage systems 100, and systems arranged at the ends of the series association constituting the module are re-applied to the external application by means of lids individual 230, 240.
Conversely, if one wishes to make a module 110 of n systems electrical energy storage 100 in parallel association, n being greater than or equal to 2, all isopotential ends of the systems will be connected to each other on the same side by a single cover having as many connecting means (flange 232, 242, seal 510, 520, glue 610,620) than systems with connect in parallel.
Finally, if we want to make a module 110 comprising at least a combination of serialization or paralleling of systems 100 or 'group of systems 100, the skilled person will adapt the desired number of single covers 230, 240 and bi-lids 900 combined with one another to enable said series or in parallel of said systems 100 or groups of systems 100.
A system 100 provided at one end of the module 110 presents a main body 211 closed at one end 213 by a cover 240 equipped with an electrical connection pad 239, which is used as one of the two output terminals of the electrical energy storage module 110.
At the opposite end 212, the same main body 211 is closed by one of the covers 230 of a pallet 910, the other cover 230 of the same pallet 910 closing the main body 211 of the envelope 200, at the same end 212, of a juxtaposed system 100.
This system 100 is itself connected to another system 100 juxtaposed by another pallet 910 bi lid arranged at the end opposite of the first pallet 910 and so on.
On the latest electrical energy storage system 100

24 module 110, is placed on a cover 240 the second bonding pad 239 used as the second of the two output terminals of the module 110.
The advantage that results from this module configuration 110 is the removal of connecting parts between the different systems of electrical energy storage 100.
On the other hand, the welding steps are reduced since However, that of 910 pallets with two lids on the wound elements electrical energy storage.
Those skilled in the art will appreciate a storage system 100 of electrical energy offering a configuration, simple and reliable, achieved by gluing while providing a precise electrical connection and effective.
On the other hand, this system presents, compared to the devices known from the state of the art, a sealing system resistant to very high internal pressures and whose tightness, adjustable, reaches values below 10-9 mbar.ls-1.
In addition, this system 100 of electrical energy storage offers the advantage of presenting savings in terms of costs, time, of space.
Finally, the present invention is not limited to supercapacitors and can be performed for any set of high energy storage. Examples of these are non-limiting, generators, batteries or capacitors.
Of course, the present invention is not limited to the modes particular embodiments which have just been described but any variant in accordance with his spirit. In particular, this invention is not limited to the accompanying drawings. The references specific features illustrated in the previous paragraphs are non-limiting examples of the invention.

Claims (40)

1. An electrical energy storage system comprising at least one coiled electrical energy storage element placed inside a envelope, said envelope enclosing the coiled energy storage element in a main body of the envelope and comprising at least one cover, characterized in that said cover, disposed at one end of body main envelope and electrically connected by connecting means electrical connection to the coiled electrical energy storage element, is attached to the body main envelope by a gluing means. 2. System according to claim 1, characterized in that the means of bonding is arranged to overcome an interposed positioning seal enter the main body of the envelope and the lid. 3. System according to any one of claims I and 2, characterized in what the positioning joint and the gluing means are arranged in a annular groove delimited by the outer wall of the main body of the envelope and the inner face of a collar present on said lid. 4. System according to claim 2, characterized in that the seal of positioning and the gluing means are arranged in an annular groove delimited by the inner wall of the main body of the envelope and the face external a collar present on said lid. 5. System according to claim 2, characterized in that the seal of positioning and the gluing means are arranged in an annular groove delimited by the wall of the main body of the envelope and a double collar carried by the lid. 6. System according to claim 2, characterized in that the seal of positioning and the gluing means are arranged in an annular groove delimited by a collar secured to a lid and a double collar carried by the main body of the envelope. 7. System according to any one of claims 3 to 6, characterized that the positioning gasket is made of an electrically no driver. 8. System according to any one of claims 3 to 6, characterized the bonding means is an electrically insulating adhesive. 9. System according to claim 8, characterized in that the means of Bonding is a gas and fluid tight adhesive. 10. System according to any one of claims 8 and 9, characterized in that the gluing means is a thermosetting epoxy type glue. System according to one of Claims 1 to 10, characterized in that each lid comprises an electrical connection disk provided with connection pads as means of electrical connection and ranges of rigidity. 12. System according to claim 11, characterized in that the thickness of the cover at connection pads is of the order of 0.4 mm to 1 mm, the connection being made by welding. 13. System according to any one of claims 11 and 12, characterized in that the thickness of the lid at connection pads is order from 0.4 mm to 3 mm, the connection being made by stirring. 14. System according to any one of claims 11 to 13, characterized in that the thickness of the cover at the connection pads is order from 0.4 nm to 3 mm, the connection being made by stirring-diffusion. 15. System according to any one of claims 11 to 14, characterized in that the welding pads are in the form of bosses convex towards the inside of the main body of the envelope. 16. System according to claim 15, characterized in that the element coiled electrical energy storage includes collecting slices of current having concave deformation ranges complementary to the convex bosses of the lid. 17. System according to any one of claims 1 to 14, characterized in that the lid has a flat inner bottom, connection pads being formed as recesses on the outer face of the lid. 18. System according to any one of claims 1 to 14, characterized in that the lid has a flat inner bottom, stiffness ranges being formed by raised ribs on the outside of the lid. 19. System according to any one of claims 1 to 14, characterized in that the lid has a flat interior bottom and in that the connection between the coiled electrical energy storage element and the lid is achieved by means of at least one connecting bar arranged between the cover, inside the main body of the envelope, and the slice collector current of the electric energy storage coil element. 20. System according to claim 19, characterized in that the bar of electrical connection is in the form of a part having a face external plate connected electrically to the cover and an inner face comprising a boss electrically connected to the current collector slices of the element coiled electrical energy storage. 21. System according to any one of claims 19 and 20, characterized in that the electrical link is in the form of form of a star grouping several pieces presenting organized bosses radially around the center of the star. 22. System according to any one of claims 19 to 21, characterized in that it comprises between the collecting slices of the wound element and the part inside the lid, at least one layer of conductive metal foil thin, covering at least the surface of the lid-connection pads slices collectors and added to compensate for any shortcomings in connection when welding the cover on the slices. 23. System according to claim 22, characterized in that the sheet thin metal is made in the form of a star whose branches overlap the surface of the connection pads cover-slices collectors. 24. System according to any one of claims 22 and 23, characterized in that it comprises several layers of thin metal sheets capable of bring a significant amount of connection material without requiring a important energy supply to weld them. 25. System according to any one of claims 22 to 24 in combination with claim 12, characterized in that it comprises a bring of material on the current collecting slices of the coiled element by shooping said collecting slices. 26. System according to any one of claims 22 to 25, characterized in that the connection pads of the collector slices of the element coil are produced by radial coating of the collecting slices from the center towards the outside of the coiled electrical energy storage element. 27. System according to any one of claims 22 to 26, characterized in that connection pads are made fluid-tight after their connection by adding a layer of glue or resin all over their area. 28. System according to any one of claims 22 to 27, characterized in that it comprises at least one anti-opening safety bellows in case of internal overpressure, arranged on the main body of the envelope. 29. System according to any one of claims 22 to 28, characterized in that it comprises at least one anti-opening safety bellows in case of internal overpressure, arranged on a cover between a bonding zone of lid and the inside of it. 30. System according to any one of claims 22 to 29, characterized in that it comprises a central circular channel disposed within the winding of the coiled energy storage element, said channel opening on the other hand go through at least one of the lids, to allow the circulation of a fluid coolant for purposes of thermal regulation of the system. 31. System according to claim 30, characterized in that the central channel is formed of a hollow aluminum tube integral with one of the lids, and glued sure the other cover by a bonding means cooperating with a collar power plant belonging to said other lid. 32. Electrical energy storage module comprising at least two electrical energy storage systems according to any one of Claims 1 to 31, characterized in that at least two lids enclosing two coiled electrical energy storage elements arranged in two body main envelopes juxtaposed, form a bi-lid piece, common the two electrical energy storage systems, the elements constituting said module being closed at their opposite end by respective covers. 33. Module according to claim 32, characterized in that the bi-part cover, includes a pallet provided at both ends with two lids connected by a connecting bar, each of the two covers being intended for to assemble with one of the two main bodies of envelopes. 34. Module according to any one of claims 32 and 33, of electrical energy storage systems in series combination, n being superior or equal to 2, characterized in that the systems are interconnected in pairs at means of n-1 bi-lids, the bi-lids connecting two systems in pairs consecutive, the systems arranged at the ends of the series association constituting the module being connected to the external application by means of covers individual. 35. Module according to any one of claims 32 and 33, of electrical energy storage systems in parallel association, n being greater than or equal to 2, characterized in that all the extremities isopotential systems are interconnected on the same side by a single cover having as many connection means: flange, seal positioning, glue, that systems to connect in parallel. 36. Module according to any one of claims 32 to 35, comprising at least one combination of serialization or paralleling of systems or group of systems, characterized in that it comprises bi-part lids combined to allow said series or parallel of the systems or groups of systems. 37. Method for producing an electrical energy storage system implemented by at least one coiled electrical energy storage element placed inside an envelope, said envelope comprising at least one cover enclosing the coiled electrical energy storage element in a main body of the envelope characterized in that it comprises at least one step fixing the cover, at one end of the main body of the envelope, by a gluing means surmounting a positioning joint interposed between the body main envelope and said cover. 38. The method of claim 37 characterized in that the step of fixing is carried out before or after a step of electrical connection of said cover by means of electrical connection to the storage coil element of electrical energy. 39. Process according to any one of claims 37 and 38, characterized in that the electrical connection step comprises a laser welding step by transparency under pressure of current element slices coil electrical energy storage with welding ranges included on the lid. 40. Process according to any one of claims 37 and 38, characterized in that the electrical connection step comprises a stirring step-diffusion producing a deposit of gallium on the lid before stirring the cover assembly and current collector slices of the wound element of electrical energy storage.